Nepal, Sept. 2 -- China accounts for 43 percent of the total number of globally authorized nanotechnology patents over the last 25 years, ranking first in the world, said a white paper issued Sunday.

Between 2000 and 2025, more than 1.07 million nanotechnology patents were granted globally, with China accounting for 464,000. China's share surpasses the combined total from the United States, Japan and the Republic of Korea, according to the White Paper: China Nanotechnology Industry 2025, which was issued at a nanotechnology industry forum held in Beijing.

China's patent portfolio is primarily focused on key areas, including semiconductor devices, catalytic chemistry, biomedicine, and new materials. Beijing, Shanghai, Shenzhen and Suzhou...